/*
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 */

/*
 * Copyright (c) 2009 by Oracle Corporation. All Rights Reserved.
 */

package javax.xml.stream;

/**
 * An error class for reporting factory configuration errors.
 *
 * @author Copyright (c) 2009 by Oracle Corporation. All Rights Reserved.
 * @version 1.0
 * @since 1.6
 */
public class FactoryConfigurationError extends Error {

  private static final long serialVersionUID = -2994412584589975744L;

  Exception nested;

  /**
   * Default constructor
   */
  public FactoryConfigurationError() {
  }

  /**
   * Construct an exception with a nested inner exception
   *
   * @param e the exception to nest
   */
  public FactoryConfigurationError(java.lang.Exception e) {
    nested = e;
  }

  /**
   * Construct an exception with a nested inner exception
   * and a message
   *
   * @param e the exception to nest
   * @param msg the message to report
   */
  public FactoryConfigurationError(java.lang.Exception e, java.lang.String msg) {
    super(msg);
    nested = e;
  }

  /**
   * Construct an exception with a nested inner exception
   * and a message
   *
   * @param msg the message to report
   * @param e the exception to nest
   */
  public FactoryConfigurationError(java.lang.String msg, java.lang.Exception e) {
    super(msg);
    nested = e;
  }

  /**
   * Construct an exception with associated message
   *
   * @param msg the message to report
   */
  public FactoryConfigurationError(java.lang.String msg) {
    super(msg);
  }

  /**
   * Return the nested exception (if any)
   *
   * @return the nested exception or null
   */
  public Exception getException() {
    return nested;
  }

  /**
   * use the exception chaining mechanism of JDK1.4
   */
  @Override
  public Throwable getCause() {
    return nested;
  }

  /**
   * Report the message associated with this error
   *
   * @return the string value of the message
   */
  public String getMessage() {
    String msg = super.getMessage();
    if (msg != null) {
      return msg;
    }
    if (nested != null) {
      msg = nested.getMessage();
      if (msg == null) {
        msg = nested.getClass().toString();
      }
    }
    return msg;
  }


}
